Settings And Checkout - Honeywell T87F Series Product Data

LOW LIMIT
OPERATING CONTROL
T87F
Y
R
W
SERIES 10 OPEN
CIRCUIT HIGH LIMIT
Fig. 12. T87F (replacing a series 10 thermostat) connected
to a 3-wire open contact, high-limit control.
To Replace a Series 20 Thermostat
Tradeline® T87F Thermostats directly replace series 20 spdt
thermostats, or thermostats in heating installations that
require contact on both a rise and fall in temperature (see Fig.
13).
LEVEL
Y
R
W
R B W
TR TR
L1 L2
(HOT)
1
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2 MAKE CONNECTIONS AS SHOWN: R TO R, W TO B, Y TO W.
Fig. 13. Tradeline® T87F in Series 20 Heating Circuit.
To wire a series 20 thermostat:
Series 20 Thermostat
R
B
W
JUMPER
B
B
TO THERMOSTAT
CONNECTIONS ON
W W
SERIES 10 VALVE
AT BURNER
R R
M6102
137421A
WALLPLATE
LEVEL
2
SERIES 20
MOTOR OR VALVE
TRANSFORMER
M20778
T87F Thermostat
R
W
Y

SETTINGS AND CHECKOUT

Temperature Selection
To select the desired temperature, turn the transparent dial
until the desired point on the setting scale (top scale) is in line
with the pointer.
On models with range stops the temperature range may be
limited at either extreme. The left stop is for the low extreme,
the right stop for the high extreme (see Fig. 14).
Heat Anticipator Adjustment
The thermostat has an adjustable heat anticipator that must
be set on the number that corresponds to the current rating of
the primary control of the system (for example; gas valve, oil
primary).
CAPTIVE
MOUNTING
SCREW (3)
Fig. 14. T87F interior detail.
SCALE
HOLE SUITABLE FOR
PENCIL POINT
TO MOVE INDICATOR
Fig. 15. Adjust heat anticipator to match current rating of
7
T87F THERMOSTATS
SETTING SCALE
ADJUSTABLE RANGE
STOPS ON SOME MODELS
CALIBRATION NUT
ROOM TEMPERATURE SCALE
HEAT ANTICIPATOR INDICATOR
.12
.15
HEAT
ANTICIPATOR
INDICATOR
primary control.
M19049
M1368A
60-2222—3